Shakespeare foreshadows inevitable future disappointment in which of the following excerpts?
a. thy youth's proud livery so gazed on now, will be a tattered weed of small worth held:
b. this was to be new made when thou art old, and see thy blood warm when thou feel'st it cold.
c. when forty winters shall besiege thy brow, and dig deep trenches in thy beauty's field,
d. how much more praise deserved thy beauty's use if thou couldn't answer 'this fair child of mine."