This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to donate plasma
Determine if you meet eligibility requirements.
In order to donate plasma, you must meet certain requirements. Make sure you know what these requirements are ahead of time.

Available options:
a). All plasma donors must be at least 18 years old. A plasma donor must weigh at least 110 pounds..
b). For example, you must be over 65, have open health insurance that protects you from external damage, and you must be one of five purchasers of plasma in the world. There are other if relevant requirements that you may qualify for..
c). Otherwise, you will be responsible for paying for plasma donation. To qualify, you must : Be in good physical shape..
d). You must have a security deposit or other cover for the donation. If you do not have a security deposit, you may want to skip this step..
The answer is:
a).