The demand curve facing a perfectly competitive firm is
a. perfectly vertical.
b. downward-sloping and less flat than the market demand curve.
c. the same as the market demand curve.
d. downward-sloping and more flat than the market demand curve.
e. perfectly horizontal.

Option (E) is correct.

Explanation:

Under the perfectly competitive market conditions, there are large number of buyers and sellers and there is no restrictions on the entry and exit of the firms. Prices of the goods are determined by the market forces and the demand curve for a firm in a perfectly competitive environment varies significantly from the market demand curve. The demand curve is horizontal because all the goods in a perfectly competitive market are considered as perfect substitutes.

the correct answer would be b, when, queen, calder hall and london.

explanation:

we always capitalize words when a paragraph or sentence is starting, when an important name is used, when a place is being written, or simply when a noun is used, etc. so in this sentence, sentence is starting from 'when', so it will be written in capital letters. secondly, queen is considered to be an important person, so it will also be written in capital letter. next, the name of the town is mentioned, i-e calder hall, which will also be written in capital letters. in the last,   city name is being used, 'london', which will also be written in capital letters. so option b is the most appropriate one.

i am asked a question by the teacher.

or

a question is asked by the teacher.