When the wavelength of a wave becomes longer, its frequency will
a. decrease
b. increase
c. stay the same

as the wavelength changes, the frequency changes inversely. When the wavelength becomes longer, the frequency is "lower" and vice versa. So the correct answer should be A) Decrease

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.