选择题：“Nor lose possession of that fair thou ow’st;

“Nor lose possession of that fair thou ow’st;

Nor shall Death brag thou wander’st in his shade,

When in eternal lines to time thou grow’st:

So long as men can breathe, or eyes can see,

So long lives this, and this gives life to thee. ”

Questions:

A. Who’s the poet of the quoted stanza, and what’s the title of the poem?

B. What does the word “this” in the last line refer to?

C. What idea do the quoted lines express?