Biochemical oxygen demand is . Group of answer choices measured in a test that passes the sample through a filter and then weighs it unaffected by secondary sewage treatment all of the answers are correct a measure of the amount of oxygen that may be used up when a wastewater enters a stream usually about 5% in untreated sewage

i am going to guess that it is co2.

this is a good question! i'll do some research and come back when i have the answer!

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.