Over the years, bacteria have become less sensitive to antibiotics used for medicinal and sanitation purposes. This lack of sensitivity is termed antibiotic resistance. How is antibiotic resistance an adaptation?

The trait giving bacteria antibiotic resistance has become common, giving bacteria with the trait a selective advantage.

Explanation:

the answer to this predicament is false, by friend, i had this on a quiz, and i got it wrong, so i learned it, cos i was gonna have it on a test, and i got it right

your answer is "the 1950's"