Even if a firm has developed a product that addresses the needs of a specific, substantial market segment, its efforts will fail if the segment is .

Unreachable

Explanation:

Unreachable segment or market is the one, where the firm or the organization is unable to sold their goods and services and could earn profit out of it.

So, even though the firm has developed the product and the service, which also addresses or has the needs of the particular, segment of substantial market, then their efforts might fail if the segment or the market is unreachable for them, because they could not able to sold their products.

b. a single paragraph.

a paragraph is a series of sentences that are organized and make sense, and are all related to a single topic . almost every piece of writing you do that is longer than a few sentences should be organized into paragraphs. this is because paragraphs show a reader where the subdivisions of an essay begin and end, and thus the reader see the organization of the essay into subjects in order to be able to understand its main points.

the answer is a.

by: nicholas dooley