“And every fair from fair sometime declines,By chance, or nature's changing course, untrimm'd;But thy eternal summer shall not fadeNor lose possession of that fair thou ow'st…”In the above 4 lines, the persona says that __________.
选项：

A:the beauty in nature will last forever;
B:his friend’s youth and beauty will last forever;
C:his friend’s youth will fade someday;
D:his friend’s beauty is just like the beauty in nature