Final answer:
Mary has the highest investment in the future.
Step-by-step explanation:
To determine who has the highest investment in the future, we need to analyze the given information. According to the provided options, we can calculate the investments made by John and Mary:
- John's investment: $200,000
- Mary's investment: $600,000
- No information provided
- Both have equal investments: $400,000
Since the information is not provided for the third option, we can exclude that choice. Comparing John and Mary's investments, we can see that Mary has the highest investment with $600,000.
Therefore, the correct answer is Mary (option B).