Option:

You have the option to upgrade your membership. 

You have several options to choose from.

Optional:

Attending the workshop is optional, but it is highly recommended

Alternative 

I'm considering an alternative approach to solve this problem.  

Preference 

What is your preference, tea or coffee?  

 Her preference is to work in a quiet environment.  

Decision-making 

Good decision-making skills are crucial in business. 

Decisive 

A good leader needs to be decisive in making choices.  

Decisive:

 His decisive action saved the company from a major crisis.  

"When one door closes, another opens."  

"The hardest choices in life aren't between what's right and what's wrong but between what's right and what's best." -