Sometimes tests for organic molecules are difficult to perform. For example, the color of the materials to be tested can affect the validity of the test. What would be the problem in testing grape juice (not grapefruit!) for protein?

c. establishing proper sleep hygiene

it's false. hope i .

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.