Which of the Following Explains Why Epoxides Are Much More

Which of the following explains why epoxides are much more reactive than ethers?

A) The C-O-C bond angle of an epoxide is 109°, making epoxides have angle strain.
B) The oxygen atom of an epoxide is sp² hybridized.
C) The C-O-C bond angle of an epoxide is 120°, making epoxides have angle strain.
D) The C-O-C bond angle of an epoxide is 60°, making epoxides have angle strain.