Chris puts on PPE in order to protect:AHimself from George, the guinea pig.BGeorge, the guinea pig.CThe equipment.DHis body from radiation.

Let's analyze the question step by step:

1. Identify the key elements:

   • Chris is putting on PPE (Personal Protective Equipment).
   • The purpose of PPE is to provide protection.

2. Evaluate each option:

   • A. Himself from George, the guinea pig.
     • This suggests Chris is protecting himself from potential harm caused by George.
   • B. George, the guinea pig.
     • This implies Chris is protecting George from potential harm caused by Chris.
   • C. The equipment.
     • This means Chris is protecting the equipment from potential contamination or damage.
   • D. His body from radiation.
     • This indicates Chris is protecting himself from radiation exposure.

3. Determine the most likely scenario:

   • PPE is commonly used to protect the wearer from hazards. In this context, it is most logical that Chris is protecting himself from something potentially harmful.

4. Consider the context of a guinea pig:

   • Guinea pigs are not typically associated with radiation hazards.
   • It is more plausible that Chris is protecting himself from potential allergens, bites, or scratches from George.

5. Conclusion:

   • The most appropriate answer is A. Himself from George, the guinea pig.

Therefore, the correct answer is A.