Which one of the followingstatements is nutrue about aztreonam.. It is active against both grampositive and gram negative micro- organisms

Which one of the followingstatements is nutrue about aztreonam:
A) It is active against both grampositive and gram negative micro- organisms***
B) It is a mono bactam
C) Its usual dose is one gram every 8 hours
D) It has low tendancy to causehypersensitivity in pencillin allergic patients.