train a high speed 15 km per hour later than train B if train a Travels 150 km in the same time train B Travels 120 km what are the speed of the two trains​

anyone me i need

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."

answer; ///attempts to change more than once behavior at the same time;

answer; unquestionably determine the basic dimensions of personality; plz check this one first, i believe its correct good luck;