Identify the selection that contains a fragment a. she doesn't give herself enough credit which is too bad b. she doesn't give herself enough credit that's too bad c. she doesn't give herself enough credit which is too bad d. she doesn't give herself enough credit so it is too bad

The selection that contains a fragment is B.

Every other sentence contains two distinct clauses put together by the use of a relative pronoun (which in A and C) or a conjunction (so in phrase D). In B, the two clauses "she doesn't give herself enough credit" and "that's too bad" are not linked syntactically and are simply juxtaposed.

Although not grammatically "correct", the use of a fragmented syntax a frequent trait of oral speech.