Light microscopes can magnify objects up to their size.
a. 40 x
c. 1000 x
b. 100 x
d. 50 x

The answer is C. 1000x. However an understanding of types of light microscopes is needful. A light microscope uses focused light and lenses to magnify an object. Light microscopes come in several forms. (1) Simple light microscopes use a single lens to magnify an object and cannot reach high magnification just like a handheld lens whose highest clear magnification in the best conditions is 25x. (2) Compound light microscopes use two sets of lenses - an objective lens and an eye piece. This is the type of light microscope whose magnification power reaches between 1000x and 2000x.

The correct answer is c. hope this

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings.