What kind of NAT enables Source Port Address Translation by default?

What kind of NAT enables Source Port Address Translation by default?
A . Automatic Static NAT
B. Manual Hide NAT
C. Automatic Hide NAT
D. Manual Static NAT

Answer: C

Explanation:

https://sc1.checkpoint.com/documents/R81/WebAdminGuides/EN/CP_R81_SecurityManagement_AdminGuide/Topics-SECMG/NAT-Rules.htm