Final answer:
The excerpt that best supports the answer in Part A is when the captain suggests trying to reach the beach despite the lack of help.
Step-by-step explanation:
The excerpt from the text that best supports the answer in Part A is:
"A conference was held in the boat. 'Well,' said the captain, 'if no help is coming, we might better try a run through the surf right away. If we stay out here much longer we will be too weak to do anything for ourselves at all.'"
This excerpt supports the answer in Part A because it shows the characters' decision to take action and try to reach the beach despite the lack of help. It illustrates their realization that they need to take matters into their own hands to survive.