Jason found himself having trouble focusing on the content of his professor's lecture because the classroom was uncomfortably warm. jason was experiencing

a. external noise
b. goal setting
c. listening anxiety
d. judgment

A). External noise.

Explanation:

'External noise' is demonstrated as the noise which ensues in the surroundings instead of the individual(speaker) himself/herself. Such noise could be very distracting as well as disturbing at the same time that may prevent a person from concentrating on a specific goal or objective.

In the given situation, Jason similarly experiences the 'external noise'(environmental factors) that averts him from paying attention to the lecture delivered by the Professor in the class. The environmental factor('uncomfortably warm') interferes/distracts him and hampers his concentration. Therefore, option A is the correct answer.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

the sun warms our planet, and with the moon, creates the tides. the moon orbits the earth and in turn, the earth orbits the sun. because they appear to be the same size in the sky, the sun, earth and moon work together to create eclipses. when the moon is directly in between the earth and sun