Correct option is D
‘Fostering’ is the correct word for the given blank.
(a)arbitration: the use of an arbitrator to settle a dispute.
(b)eviction: the action of expelling someone from a property; expulsion.
(c)impinging: have an effect, especially a negative one.
(d)fostering: encourage the development of (something, especially something desirable).
(e)alacrity: brisk and cheerful readiness.