Sentence Correction (SC) | A mutual fund having billions of dollars in assets will

Hiegmat andChrisLele
I have two doubts regarding the question
B) Isn't "It" in option B a placeholder pronoun referring to "to hold..". I am unable to understand why we are eliminating it because of ambiguity.
A)Isn't option (A) a run-on sentence as two independent clauses are separated by a comma. If not then what is the function on comma here?
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