Which Suit to Open?

Here are the guidelines:

1. Always open your longest suit – length, not strength is key.
2. With two five-card suits, always open the higher-ranking. Start high, so you can finish low.
3. With two four-card suits, open 1♥ if one of them is hearts, otherwise open 1♠. With 4♦-4♣, it doesn’t matter. You choose.
4. There’s a fourth guideline, less important (and far rarer) than the above:

1. 1. With three four-card suits, the dreaded 4441, it’s best to open 1 ♣ with a red-suit singleton and 1♥ with a black-suit singleton.
   
   

Which suit would you open with these?.
 

• With (a), open 1♥ (with 4♠-4♥, open 1♥); 
• with (b), open 1♥ (“high fives”); 
• with (c), open 1♣ (always longest).