help to solve the problem?
英語(yǔ)短文理解｛急｝
how does the placebo work no one know.but the brain rules the body in many subconscious ways,including its control of the body's major hormones and its subtle influnce over the immune system.so it is possible that ,in ways yet unknown ,expectations about health or disease are sometimes translated into a bodily reaction that fulfils them.the power of there effects is hard to overstate.
questionhow does placebo work?
A it fights the virus in humman bodies
B it works through people's mental power
C it controls the hormones in humman bodies
D it strngth the people's immune syrtem