For integers a$,$ b$,$ c$,$ and d$,$ if a $>$ b and c$>$ d$,$ which of

the following statements is $($are$)$ true? If more than one letter is true, write the answer in alphabetical order

A$.$ ac $>$ bal

B$.$ a $-$ c $>$ b $-$ d

C$.$ a $+$ c $>$ b $+$ d

D$.$ a$/$c $>$ b$/$d