Which of the following statements is true regarding scientific hypotheses?
a. there are no valuable hypotheses.
b. a testable hypothesis is valuable only if all evidence supports it.
c. every hypothesis is valuable, whether or not it is testable.
d. a testable hypothesis is valuable, even if evidence shows that it is false.

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons