Question

complete the text with the best transition.
some educators advocate for eliminating letter grades in high school because a five-letter grading system fails to authentically capture what students are really capable of learning. ______, the resulting logistical inconveniences would likely outweigh the benefits, as colleges would have to evaluate prospective students on the basis of something other than gpa.
that being said
along the same lines
admittedly

Explanation:

The transition needs to acknowledge a counterpoint to the prior argument against letter grades. "Admittedly" is used to concede a valid opposing point, which fits here as the sentence introduces logistical downsides to eliminating letter grades after stating the academic critique of them. "That being said" and "Along the same lines" do not fit: the former shifts to a related but separate point, while the latter continues a similar line of reasoning, neither of which matches the need to concede a counterargument.

Answer:

Admittedly