Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to grow a staghorn fern [title] Scrape spores off the bottom of a fern leaf. [step] Hold a leaf from a staghorn fern over a white piece of paper, bottom side up. Use a butter knife to gently scrape off the little brown dots all over the bottom of the leaf.

Ending1: While you can strip this off if you don't have a fancy bottom, its shells and smaller group of leaves will probably work best. [title] Hold the leaf underneath a green plastic cup to keep the green sides of the leaf cool. Ending2: If you only want a single layer, scrape the tiny white dots out the bottom rather than scraping them off. What this does is include a " sieve " at the bottom of the leaf that puffs up little specks of spores. Ending3: Pick up the leaf and discard it. [substeps] In the process, you may want to scrub away the specks of spores that have collected on the leaf. Ending4: Once you have a pile about the size of a quarter, you can stop. Be careful to keep the spore pile on the piece of paper.

Answer format: ending1/ending2/ending3/ending4