The rectal thermometer is the BEST instrument to use when

Taking the animals temperature

Explanation:

Rectal temperatures are more accurate so they might also be used in someone who has severe hypo- or hyperthermia to obtain a more accurate core temperature. ... If someone has a heart condition, inserting a rectal thermometer can stimulate the vagus nerve and cause heart arrythmias (irregular heart beats).

Have a great day

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.