WRITING (PART A—–(–1))=BY THE CHANGE IN XVALUES. THEREFORE,(3–(20)MUL...

22. b.The phrases since they[microprobes] are slightlyis necessary to indicate the restrictive nature ofthinner than a human hairand because of theirthe adjective more. Choice bis incorrect because[microprobes’] diminutive width contain theno comma is necessary after statistics. Choice csame information. Choices a,c, and dare incor-is incorrect because it erroneously inserts theadverb therein a context where the possessiverect because the sentences indicated in thosechoices are not redundant.pronoun theiris required.