Answer:
since the question is incomplete, I looked for a similar one:
- the most diversified portfolio is: $3,400 in a mutual fund, $3,300 in bonds and $3,300 in land.
 - the second most diversified is: $10,00 in a mutual fund
 - the third most diversified: $5,000 in one stock and $5,000 in another
 - the least diversified: $10,000 in one stock
 
A mutual fund invests in different stocks and securities, so investing in a mutual stock is considered a diversified investment. But investing in mutual funds, bonds and land is even more diversified (you added 2 different typs of investments to an already diversified investment).