Which word is an antonym of the underlined word in the paragraph?

lisa talks all the time and she’ll talk to just about anyone. it’s not unusual for her to profess her thoughts and feelings to total strangers while standing in line at a store. i’ve told her many times that some people might not want to speak with her. she laughed and said she’s just being friendly.

a.
conceal

b.
deliver

c.
admit

d.
introduce