When spermatozoa are placed in vagina after ovulation they begin to move faster. What is the name of this process (special activation of spermatozoa)?

When spermatozoa are placed in vagina after ovulation they begin to move faster. What is the name of this process (special activation of spermatozoa)?

1.  Acrosomal reaction


2.  Denudation


3.  Penetration


4.  Cortical reaction


5.  *Capacitation