In the rhythm method of birth control, the couple abstains from intercourse

1. The rhythm technique is a type of birth control. 
2. This type of birth control entails a woman keeping an eye on her cycle while she is fertile and abstaining from sexual activity or using alternative birth control during that time. NFP, or "natural family planning," is another name for it.
3. The rhythm method of birth control involves couples planning their sexual activity only around the female partner's menstrual cycle and refraining from it during ovulation.
4. The most fertile days are the three days before and after ovulation.
5. In the rhythm means of birth control, no sex is had by the pair either on the day of ovulation or five days prior. 

Hence, option C is the correct answer.