What is the difference between an optical drive and a solid state?
a. optical drives store data magnetically to a disc; solid states store data electronically to a microchip.
b. optical drives store data electronically to a microchip; solid states store data magnetically to a disc.
c. optical drives are for storing graphical data; solid states are for storing text data.
d. optical drives are for storing text data; solid states are for storing graphical data.

Which of the following commands is more recommended while creating a bot?

Consider the following code snippet: #ifndef cashregister_h#define cashregister_hconst double max_balance = 6000000.0; class cashregister{public: cashregister(); cashregister(double new_balance); void set_balance(double new_balance); double get_balance() const; private: double balance[12]; }; double get_monthly_balance(cashregister bk, int month); #endifwhich of the following is correct? a)the header file is correct as given.b)the definition of max_balance should be removed since header files should not contain constants.c)the definition of cashregister should be removed since header files should not contain class definitions.d)the body of the get_monthly_balance function should be added to the header file.

In vista and windows 7, the appearance and personalization option allows you to change the