Question

which choice most concisely expresses the information in the underlined portion of sentence 11? a no change b concepts about which everyone should learn. c essential concepts about which everyone should learn and study d essential concepts about which everyone should learn.

Explanation:

The goal is to find the most concise option that retains the core meaning of the underlined text. Option A repeats "crucial and essential" which is redundant. Option C adds the unnecessary word "study". Option B removes the redundant "crucial and" while keeping the key information that these are necessary concepts for everyone to learn, which is concise and accurate.

Answer:

B. concepts about which everyone should learn.