I have some question about the verbs "*adhere to*", "*follow*", and "*obey*" .  Suppose there is a plan, and part of the plan includes a particular person (Mike) giving a speech reading from a prepared text.  The plan also contains rules for other activities.  If I write the following sentences:  

>1a. Mike ***adhered to*** the prepared text.  
1b. Mike ***followed*** the prepared text.  
1c. Mike ***obeyed*** the prepared text.  

>2a. Mike ***adhered to*** the rules.  
2b. Mike ***followed*** the rules.  
2c. Mike ***obeyed*** the rules.  

Since "*obey*" is similar to "*follow*" and "*adhere to*", and 2c is okay due to the correctness of 2a+2b, then 1c should bee okay due to the correctness of 1a+1b.  But for some reason, 1c seems a little off to me.  What do native speakers think?