What is one reason that WPA encryption is preferred over WEP?

What is one reason that WPA encryption is preferred over WEP?

A.
A The access point and the client are manually configured with different WPA key values.

B.
The access point and the client are manually configured with different WPA key values.

C.
WPA key values remain the same until the client configuration is changed.

D.
The values of WPA keys can change dynamically while the system is used.

Explanation:
WEP is security mechanism that encrypts grouping information between Access Point and Client in "RC4" mode. Password is easily cracked. The encryption key that WEP uses includes the 40 bits (104 bits) general key that both receiver and sender predefined, and the 24 bits encryption key (IV key) that sender defined for each group. However, in order to tell communication object the IV key, IV key is embedded in the grouping information directly and sent out without encryption. If wiretapping, collecting some certain IV key grouping information and then analyze, even secret general key will be worked out.