The intersection point of the line for option 1 and the line for option 2 is (7,70).
By observing the graph we get the following
For less than 7 visitors, the cost of option 1 is cheaper than option 2.
So the statement in the first option is false.
For visitors 4,
The cost for option 1 is $55.
The cost for option 2 is $70.
The difference is $70-$55=$15.
So the cost of option 1 is cheaper $15, for visitors 4.
Thus the statement in the second option is false.
For visitors 11,
The cost for option 1 is $90.
The cost for option 2 is $70.
The difference is $90-$70=$20.
So the cost of option 1 is $20 more expensive, for visitors 11.
Thus the statement in the third option is false.
For more than 7 visitors, the cost of option 1 is more expensive.
Hence the statement in the fourth option is correct.
