OK , here 's what happened . We took an excursion boat out of Juneau to see some whales . The boat had a naturalist on board who told us we would be lucky to see orcas , but humpbacks were common . Soon , however , he got a call from a sister ship that had spotted some orcas , looking like they were on a hunt .

[a]. None of the above choices .
[b]. They would have given up looking for whales .
[c]. The group would have missed the orcas .
[d]. They would have seen several orcas on a hunt .
Answer the following question: What might have happened if they had n't gotten the call ?
[c].