Acknowledging the volunteers’ giving of a great deal of their time to

Acknowledging the volunteers’ giving of a great deal of their time to canvass the neighborhood and collect donations from the neighbors, the chairman of the local United Way expressed his sincere gratitude.

A. Acknowledging the volunteers’ giving of a great deal of their time to canvass the neighborhood and collect donations from the neighbors, the chairman of the local United Way expressed his sincere gratitude.

B. Acknowledging the time spent by neighborhood volunteers to canvass and to collect neighborhood donations, the chairman of the local United Way expressed his sincere gratitude.

C. With sincere gratitude, the chairman of the local United Way expressed his acknowledgment of the neighborhood donations canvassed and collected on the volunteers’ time.

D. The chairman of the local United Way offered sincere thanks to the volunteers who gave so much time to canvass the neighborhood to collect donations.

E. The chairman of the local United Way thanked the neighborhood volunteers, sincerely.