Theo compared 7/10 and 1/3 by first comparing each fraction to 1/2. Step 1: 
7/10 is less than 1/2 
Step 2: 
1/3 is less than 1/2 
Step 3: So, 7/10> 1/3 
In which step did Theo make his first mistake? 
a) Step 1 
b) Step 2 
c) Step 3 
d) Theo did not make a mistake.