This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to start a t shirt business
Identify your target market.
Since the t-shirt market is already so developed, your own business won't survive long if you try to compete with every other t-shirt business. Instead, focus on one target market or niche.

1. Your website should include detailed information on each market you are considering. Conduct research on current current t-shirts market trends. 2. Otherwise, you might miss that kernel of diversification. Complete some research into the market history of t-shirts. 3. The more you know about which market you are competing with, the better your chances are of success. Check the newsstand or advertising website to see if it has information about current or upcoming t-shirts. 4. Make your target market specific without becoming too obscure. For example, " funny graphic shirts " would be a bad market since it's too broad.
The answer is:
4.