What advancement in the use of metal was achieved by the people of the Gupta Empire? They were the first civilization to mine iron ore.
They came up with methods to convert iron into steel.
O They created methods to extract metal from ore.
They were the first civilization to work with bronze.

true

explanation:

agreeableness is a personality trait manifesting itself in individual behavioral characteristics that are perceived as kind, sympathetic, cooperative, warm, and considerate.

it would be d). more resources must be obtained to attain that combination of goods and services

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."