Teresa is training for a triathlon, a timed race that combines swimming, biking, and running. Consider the following sentence: Teresa has only 20 hours this week that she can devote to training. Each hour she spends swimming is an hour that she can't spend biking or running. Which basic principle of individual choice do these statements best illustrate? People face trade-offs. Teresa can use time most efficiently by spending the same amounts of time on swimming, biking, and running. People usually exploit opportunities to make themselves better off. Teresa has an incentive to spend more time on swimming than on biking or running.

People face trade-offs

Explanation:

It demonstrates this because Teresa must decide what she should practice at a given moment, given her limited time. This shows opportunity cost.

the correct answer is "c": the pillars proclaimed his regret at the bloodshed at the battle of kalinga and his conversion to buddhism.

the kalinga war is considered as one of the largest battles in the history of india. it was fought between the between the maurya empire, which ruled the lands of what is now known as india at the time, and the independent feudal kingdom of kalinga.

the army of maurya empire, led by its king ashoka, fought a prolonged war against kalinga. the war ended around 262 bce with the victory of the maurya empire. it is believed that ashoka, after having witnessed the loss of many lives during this war, felt deep responsibility and eventually converted into buddhism.