The stretch hold is a restraint technique:
b. that requires holding a cat by the scruff with one hand.
c. in which the handler restrains the front limbs with one hand and the hind limbs with the other hand.

this if for my veterinary assistant certification. i know what the technique is but these answers are worded badly. i think its b though.

Option B,

Explanation:

Proper restraint and handling techniques are used while dealing with animals in laboratory. These techniques ease the process of dealing with animals and must be practiced on regular basis even when there is no procedure being performed.  

Unlike other animals cat is the most co-operative animals and it is usually dealt by restraining the body be one hand and head by other hand. Cats can also be restrained by holding the scruff with one hand and then gently holding the hind limbs followed by stretching it.

Hence, option B is correct.

the fossil record provides evidence of a common ancestor to many species.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.