Remark Entity Owns 40% of the Voting Ordinary Shares in Retail

Remark Entity owns 40% of the voting ordinary shares in Retail Entity. On June 15, 20X1, acquires an additional 5% of voting ordinary shares. Remark Entity also owns call options that would give it an additional 10% of the voting rights. These options have not been exercised, but are exercisable. On October 15, 20X1, Remark Entity exercises all of the call options. On which of the following dates does Remark Entity gain control of Retail Entity?

A) January 1, 20X1
B) June 15, 20X1
C) October 15, 20X1
D) Remark Entity does not have control over Retail Entity