If a minerals breaks into cubes when struck with a rock hammer, which property of mineral is being measured a.) streak b.) cleavage c.) hardness d.) color

B.) cleavage because if it could be broken by a hammer, then it means that it it tends to break along smooth surfaces, which is caused by a weak bonds between the atoms in the mineral.

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.