Final answer:
The speaker in Frost's 'The Road Not Taken' suggests an intention to revisit the first road, but also doubts if he ever will due to the way decisions lead to new paths in life. Option number a is correct.
Step-by-step explanation:
When the speaker in Robert Frost's poem 'The Road Not Taken' mentions keeping the first road for another day, he expresses the intent to revisit the first road later. However, the line 'Yet knowing how way leads on to way, I doubted if I should ever come back' reveals a level of doubt about the possibility of returning.
This suggests a contemplation of life's choices, and the recognition that each decision leads us further along a unique path, often preventing us from retreading old options. Therefore, the correct answer is (a) He intends to revisit the first road later, though there is an implied understanding that such return may not be possible.