Desmos Graphing Calculator

Copy

Verbal·Expression of Ideas·Transitions

medium

With some elements, like phosphorus, scientists were able to isolate a relatively pure sample of the substance shortly after discovering its existence but this wasn’t the case with all elements.        the isolation process took a few years. The element molybdenum, for instance, was discovered in 1778 but not isolated until 1781.

Which choice completes the text with the most logical transition?

A

Sometimes,

B

Thus,

C

Instead,

D

Similarly,