Thanks for asking question on GMAT section,

Your question was – What value does the roman number MCDL represent?

Your correct answer is- C

Now read this explanation for more clarifications:

According to the roman number representation scheme,
Letter I represents a value of 1
Letter V represents a value of 5
Letter X represents a value of 10
Letter L represents a value of 50
Letter C represents a value of 100.
Letter D represents a value of 500
Letter M represents a value of 1000

Here, We have to find the value represented by the roman symbol MCDL.
From the above data we can substitute the values for the respective symbols as follows,
M = 1000, C = 100, D = 500, L = 50
∴ MCDL = 1000 + 100 + 500 + 50
But, since, the value of C is less than the value if D, hence, we will subtract the value of C
from the value of D.
∴ MCDL = 1000 + (500 – 100) + 50 = 1450
Since, none of the options represent this value the correct answer is option e.
Hence, the correct answer is option e.