read this passage from "An Episode of War" What does the reader know about the lieutenant, based on the author's description?

The lieutenant's rubber blanket lay on the ground, and upon it he had poured the company's supply of coffee, Corporals and other representatives of
the grimy and hot throated men who lined the breastwork had come for each squad's portion
The lieutenant was frowning and serious at this task of division. His lips pursed as he drew with his sword various crevices in the heap until brown
squares of coffee, astoundingly equal in size, appeared on the blanket. He was on the verge of a great triumph in mathematics, and the corporals
were thronging forward, each to reap a little square, when suddenly the lieutenant cried out and looked quickly at a man near him as if he suspected
it was a case of personal assault. The others cried out also when they saw blood upon the lieutenant's sleeve.

The lieutenant is fair and serious about his tasks

The lieutenant is an experienced coffee drinker

The lieutenant is well liked and kind to his men

The lieutenant is unused to commanding soldiers

It can be deduced from this excerpt that the lieutenant was serious in his duty of distributing the coffee fairly to the soldiers who were lined up for their share. His seriousness is displayed in his countenance that was laced with a frown. The fair manner with which he shared the coffee can be seen in the fact that the cups of coffee were all equal in size. This shows that the Lieutenant did not show favoritism when discharging his duties. He was also clearly observant as he was quick to detect a man who seemed to have suffered an assault.

Thus, the right answer is option A.