The celebration of always takes place during the Mass.
A. Matrimony
B. Holy Orders
C. the marriage covenant
D. presbyterate

 B) holy orders

Explanation:  

The Church describes the Holy Mass as "the source and summit of the Christian life". It teaches that through consecration by an ordained priest the bread and wine become the sacrificial body, blood, soul, and divinity of Christ as the sacrifice on Calvary made truly present once again on the altar.

modal adverbs are used to modify specific verbs that consist of a linking verb (verb of being) and sometimes another verb. examples of modal verbs include can, could, may, might, must, shall, should, will and would.

modal auxiliary. an auxiliary verb characteristically used with other verbs to express mood, aspect, or tense. in english, the most common modal auxiliaries are can, could, may, might, must, ought, shall, should, will, and would. also called modal .