Which is a difference between the speech and the poster?

a) the poster focuses on the effort of sending food abroad, but the speech does not.

b) the speech focuses on both making contributions at home and sending food abroad, but the poster does not.

c) the poster directly reminds civilians how they can contribute to the war effort, but the speech does not.

d) the speech directly reminds civilians how they can contribute to the war effort, but the poster does not.