Digital SAT Reading & Writing: Some More "Boundaries" Questions 

This is a follow-up to an earlier video entitled "A Couple of Tricky 'However' Questions" ( • Digital SAT Reading & ... ). The College Board classifies these as "Boundaries" questions, as they "require test takers to apply Standard English conventions when editing short texts (typically one or two sentences in length) to ensure that the resultant sentence(s) conventionally separate or join phrases, clauses, or sentences."
The first two questions I go over involve the transitional adverb "rather," while the third example involves "though." Even so, these are essentially variations on the same kind of question dealt with in the aforementioned video. That said, it can be helpful to see additional examples, since each one is a little bit different.
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Full text of example questions:
(1) VISTAs’ responsibilities tend to be at a higher level than those found in private-sector jobs. VIISTAs are typically not hired to offer direct services such as delivering _________ they use their talents on big-picture initiatives such as building the capacity and improving the financial health of the organizations that employ them.
A) food, rather
B) food, rather,
C) food; rather,
D) food, rather
(2) To humans, it does not appear that the golden orb-weaver spider uses camouflage to capture its ______ the brightly colored arachnid seems to wait conspicuously in the center of its large circular web for insects to approach. Researcher Po Peng of the University of Melbourne has explained that the spider’s distinctive coloration may in fact be part of its appeal.
Which choice completes the text so that it conforms to the conventions of Standard English?
A) prey, rather,
B) prey rather,
C) prey, rather;
D) prey; rather,
(3) In 1943, in the midst of World War II, mathematics professor Grace Hopper was recruited by the
US military to help the war effort by solving complex equations. Hopper’s subsequent career would involve more than just _______ as a pioneering computer programmer, Hopper would help usher in the digital age.
Which choice completes the text so that it conforms to the conventions of Standard English?
A) equations, though:
B) equations, though,
C) equations. Though,
D) equations though