A) (Sentence 2) The freighter Florentine, 320 miles northeast of the Hawaiian Island of Hilo was lumbering along at about 15 knots when a garbled message came in over the radio.
This is the sentence that has a missing necessary comma. Another comma should have been placed after the word Hilo and before was.
The commas in this sentence enclosed nonessential information.
<span>The freighter Florentine, 320 miles northeast of the Hawaiian Island of Hilo, was lumbering along at about 15 knots when a garbled message came in over the radio.
</span>
Nonessential information means that if the said phrase is deleted from the sentence, then the sentence would still convey the same message.
<span>
The freighter Florentine was lumbering along at about 15 knots when a garbled message came in over the radio.</span>
The second one i hope im right
The best resource for comparing and contrasting information on cancer diseases would be option C --The science of malignant tumors. Option A is about how to beat a specific type of cancer but it does not compare or contrast information on different types of cancer. Option B seems to be a kind of biography, which may or may not contain specific information about cancer. Option D is a medical dictionary which probably contains information about different kinds of cancer, but to use it, the reader should know what word to look up. Option C is the only one addressing malignant tumors, and therefore, it is to be expected to provide information to compare and contrast different types of cancer.
