Topic: Synonyms,

Best Answer Explained in Below-:

The phrase "review the protocol on testing nuclear weapons" suggests an examination of established guidelines and regulations. In this context, the word "protocol" specifically refers to a codified set of rules that dictate how nuclear weapons testing should be conducted.

The option "A) Record of rules" is the most suitable choice because it captures the essence of what a protocol represents—a formal record detailing the rules and procedures that must be adhered to when conducting such sensitive activities.

While "B) Summary of rules" implies a condensed version of a more extensive set of guidelines, it does not encompass the entirety of the protocol necessary for nuclear testing, which requires precise adherence to documented standards.

" C) Procedures" focuses only on the steps to carry out testing but ignores the broader context of the governing principles.

" D) Problems" is irrelevant since the question pertains to reviewing existing rules rather than addressing issues related to nuclear testing.

Therefore, "A) Record of rules" is the most accurate choice, as it reflects the comprehensive nature of protocols designed to ensure safety and compliance in nuclear weapons testing.