Answer :

The correct way to write "five teaspoons" is:

○ D. 5 tsp.

Here's the explanation:

- "tbs" is an abbreviation for tablespoons, not teaspoons.
- "tspns" is not a standard abbreviation for teaspoons.
- "tee" is not a recognized abbreviation for teaspoons in cooking or measurement terminology.
- "tsp" is the standard and widely accepted abbreviation for teaspoons.

Therefore, the correct option is D. 5 tsp.