The Founder of a Company Issues 100,000 Shares of Series

The founder of a company issues 100,000 shares of series A stock for his own $250,000 investment. He then goes through three further rounds of investment, as shown below:

What is the post-money valuation for the series D funding round?

A) $2.27 million
B) $2.39 million
C) $2.52 million
D) $2.77 million