Teacher:You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Teacher: Now, understand the problem? Solve this instance: Question: 350 is increased by 50%. Find the final number.

 Option A: 725

 Option B: 625

 Option C: 225

 Option D: 525

 Option E: 425
Student:
Option D