Identify the segment of the sentence that contains a grammatical error.

A. The pact was ratified B. by the member states C. after several negotiation D. and numerous meetings.

The correct answer is after several negotiation.

Explanation:
The given sentence is broken down into four parts:
A. The pact was ratified
B. by the member states
C. after several negotiation
D. and numerous meetings.

The error lies in part C: "after several negotiation".

Grammatical Rule:
The determiner "several" indicates a quantity that is more than two but not very many. It must always be followed by a plural countable noun.

In this sentence, the singular noun "negotiation" is incorrectly used after "several". It should be replaced with the plural form "negotiations".

Correct Sentence:
"The pact was ratified by the member states after several negotiations and numerous meetings."