The answer is "A" Frost endured a number of hardships during his lifetime.
Explanation:
It's cause it is the most logical answer. Knowing Robert Frost & his background he often wrote sad poems with dark midnight moods and happy poems which uplifted you most often set in a place daytime. Robert Frost also faced many hardships during his lifetime (from an autobio I read about him). So we can connect this from his speech and Robert Frost's background to conclude and find this answer.
Due to the coronavirus public health emergency, the John F. Kennedy Presidential Library and Museum will be closed through December 31, 2020 and until further notice. More information.