Which of the following is a testable hypothesis?
a) high levels of salt in soil will probably affect plant growth by either making the plants grow better or causing the plants to die.
b) the growth rate of an e. coli bacterial colony will increase as temperature increases from 10 °c to 50 °c.
c) is there a proportional relationship between the number of pimples a person gets and the amount of chocolate he/she eats?
d) hurricanes look larger in images taken by an orbiting satellite than in video footage taken by weather reporters standing on earth's surface.