Don't exercise______an empty stomach because it can cause headaches.A,on B,with C,in D,for讲清原因！

Don't exercise______an empty stomach because it can cause headaches.A,on B,with C,in D,for讲清原因！
Don't exercise______an empty stomach because it can cause headaches.
A,on B,with C,in D,for
讲清原因！

Don't exercise______an empty stomach because it can cause headaches.A,on B,with C,in D,for讲清原因！
B
with an empty stomach 空肚子

B.with
这句话意思是别空肚子运动不然会头疼.
with有和```一起的意思
可以理解为别和空肚子一起运动`不然会头晕.