GMAT Sentence Correction (SC) | Re: By the late 1960s, the rising number

I would like to request to review this question.

According to sayantanc2k the question is flawed.

I also request to consider the comment of mihir0710.

Moreover, in support of the views of the above two users, some sentences with sources are cited below:

By the end of the Apollo program, twelve Americans had walked on the moon.
https://www.manhattanprep.com/gmat/foru
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