Read the sentences:

There is evidence that suggested Nero, the Roman Emperor, enjoyed frozen treats and demanded that a constant supply of ice from the mountains be available to him. He wanted to be able to eat the delicious dessert whenever he pleased. He added honey to the top of his dessert regularly.

What words in the text show that the word constant means something that occurs all the time?

Available, regularly
Demanded, wanted
Enjoyed, treats
Supply, dessert