I'd have to say Slowly and Cautiously.
Anyone up to talk? Be friends? Is what you meant to say :)
Heroes have flaws they have to overcome in order to defeat the enemy.
Answer:
a- Animals do not react positively to human products being tested on them as they are used to determine faults and any harm.
b- the human products often contain harmful chemicals in testing stages on animals which can lead to genetic disorders
c- because there is no definitive answer which is why they're testing to find our what is going to harm the humans
I personally think that’s only something that you can write.