Which lines from the poem best support the idea of the speaker encouraging their audience?

A
"Black may be the clouds about you / And your future may seem grim," ( Lines 9-10)
B
"If the worst is bound to happen, / Spite of all that you can do," ( Lines 13-14)
C
"Even hope may seem but futile, / When with troubles you're beset," ( Lines 17-18)
D
"But remember you are facing / Just what other men have met." ( Lines 19-20)