[Q]: Which of the following solutions is better for the following goal:
A concrete porch/ patio can be cleaned how?

[A]: Mix 1/2 cup baking soda to one gallon of water for a gentle cleaning solution. Add 1/8 cup of liquid dish detergent. Spray on patio surface, let sit for 30 minutes, then scrub and rinse. For heavily stained or mildewed patios, you may need a pressure washer.

[Q]: Which of the following solutions is better for the following goal:
How to upvote a comment on Reddit.

[A]: Find the comment you wish to upvote. Click the upward arrow to the left of the comment.

[Q]: Which of the following solutions is better for the following goal:
How to clean a knife

[A]: Use soap and water, clean from behind so you do not cut your fingers or hands.

[Q]: Which of the following solutions is better for the following goal:
pocket knife

[A]:
can cut foil