Do someone know the answer if so plz tell me

I believe the answer would be:

A. Three groups of plants—a group fertilized by X, a group fertilized by Y, and a control group with no fertilizer.

I hope this helps.

I think its a bc u have to have both X and Y fertilizer

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.