Clarissa holds a concentrated position in XYZ stock, which she purchased 15 years ago for $6 per share. The price of XYZ stock is currently at $100 per share, and Clarissa is happy with the gain that she has achieved. She realizes that it is a good idea to diversify her portfolio, but selling all of the stock in the current year will result in a large tax burden.

Which strategies would allow Clarissa to sell some of the shares this year, and delay selling some of the shares until next year to help ease the tax burden, but will lock in her sale price within a reasonable range of the current price?