Step 1: Code Analysis of NATION and EARN
NATION is represented by the code 467234. The letter-to-number mapping is as follows:
N = 4
A = 6
T = 7
I = 2
O = 3
N = 4
Similarly, EARN is coded as 1654:
E = 1
A = 6
R = 5
N = 4
Step 2: Applying the Coding Pattern to ATTENTION
The same coding pattern is applied to the word ATTENTION:
A = 6
T = 7
T = 7
E = 1
N = 4
T = 7
I = 2
O = 3
N = 4
Consequently, ATTENTION is coded as 677147234.
Final Answer: The code for ATTENTION is (D) 677147234.