多选项的更有效的if语句

I wonder if anyone has some ideas to make the following shorter and more efficient. I have 3 dropdowns where a user selects lower age limit, upper age limit and gender. They can select as many as they want, even none. I then have an if statement that will do a process based on what they select. Assume l, u and g are the parameters that are passed.I wonder if anyone has some ideas to make the f