Sentence Correction (SC) | Research has shown that when speaking, individuals who have

For me, it 's A.

There are some problems here
Parallelism: “and that they will” - “and they will”; “show that X, that Y, and Z” - “show that X, and that Y”
Modifier: Comparison: “just as frequently” -“just as frequently as”
Idiom: “in the same way as” - “in the same way that”
Sentence structure: “but nonetheless make” - “nonetheless make”

B: “but nonetheless”, we don't have Verb for "individuals", and "but" is in wrong place.

B,
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