The answer marked in red is the correct option, please explain the reasoning, formula used, definitions , etc!

02. If a pool of money is shrinking at 10% per annum (compounded monthly) for 10 years, how much will be left (rounded to the nearest 1) if the pool had 100 to begin with? A) 0 B) 26 C) 27 D) 28 E) 29 F) 30 G) 31 H) 32 I) 33 J) 34 K) 35 L) 36 M) 37 N) 38 0) 39 P) 40