Final answer:
The length of the line is 1609 mm.
Step-by-step explanation:
The length of the line can be found by converting the given options to millimeters. To do this, we need to remember that there are 1,000 millimeters in a meter.
Let's convert the options:
(A) 1609 mm = 1.609 meters * 1000 mm/m = 1609 mm
(B) 1778 mm = 1.778 meters * 1000 mm/m = 1778 mm
(C) 1854 mm = 1.854 meters * 1000 mm/m = 1854 mm
(D) 1905 mm = 1.905 meters * 1000 mm/m = 1905 mm
Therefore, the correct answer is (A) 1609 mm.