You got a new job in sales. You have a big list of leads (Big and Small). With whom will you start prospecting?

Mix leads on my opinion. You are able to be more flexible

I Rather Option B. Small leads to learn and get experience.

'B' is better and easy for a newcomer in Sales.

B. Small leads to learn and get experience

In between try for a medium and a super lead after a careful selection in order to get an exposure and assess the capabilities for creating a lead generated result.

Well, I believe it depends on how experienced and confident are you and of course how good do you know your product and company.

Starting with big leads may give you the opportunity to get a good deal that will contribute in the revenue generation of the company and of course your target. Besides, it may give you a great PUSH and motivate you more.

But it will remain risky. Making any mistake with such prospects will make you loose a great opportunity especially because big customers usually give you only ONE chance. 

As a beginner, I believe you should start with small ones. With them you can practice and build your skills. If you make a mistake, they usually give you many chances and even if the reject you, it is not a big deal. At least you learned something.

But don't wait too long to go to the big ones. Your competitors have also ears and eyes and perhaps can be faster that you.

Good Question 

I will start from the small leads.

I would go for the big leads and the sophisticated customers more without ignoring learning the small ones.

C. A mix, depending on other segmentation (for example per region)

Small leads to learn and get experience

I will start with small leads because that will assist in improving and polishing my skills to be able to tackle bigger leads with out making mistakes.

Learning curve. Also as my exp increases so will my confidence in myself and product.