The Brookville BL12CG is a 4-axle diesel-electric locomotive built by the Brookville Equipment Corporation. The locomotive is designed to meet Tier 4 emissions standards. The first two were delivered to the Central California Traction Company in April 2015.
Can we infer the following?
It is hard to meet Tier 4 emissions standards.

Available options: +Yes; +It's impossible to say; +No;
The answer is:
It's impossible to say