What is the angle between the hour hand and the minute hand at seven o\textquotesingle clock?~ ~ ．(Only consider angles less than 180°) 
选项为:A:$50^{}\circ $  B:$120^{}\circ $  C:$135^{}\circ $  D:$150^{}\circ $  E:$165^{}\circ $  请回答其中一个选项.