Directions: In the following question, a sentence is divided into four parts, out of which one has been omitted and replaced by a blank. These parts are jumbled randomly. From the given options, mark the one which contains the phrase which can replace the blank and the correct order of the parts that form a meaningfully coherent sentence as your answer.

(A) affecting the availability of staff  / (B) _______  / (C) as well as mandates and restrictions  / (D) causes of the economic slowdown