One who loves all and sundry

A. Optimist

B. Humanist

C. Altruist

D. Philanthropist

Answer: Option D

Solution(By Examveda Team)

One word substitute is Philanthropist.

Optimist: a person who tends to be hopeful and confident about the future or the success of something.
Humanist: an advocate or follower of the principles of humanism.
Altruist: unselfish concern for the welfare of others.
Philanthropist: a person who seeks to promote the welfare of others, especially by the generous donation of money to good causes.