In the context of the input sentence, determine the relationship between 'Goldman Sachs' and 'investment bank'.
Options: product/material produced, distributed by, chief executive officer, subsidiary

Reuters Share on twitter Share on Google Plus by Matthew Smith AMP Capital has engaged investment bank Goldman Sachs to advise the company on options relating to its underperforming listed China A-shares fund as the deadline for further activist pressure on AMP loomed.
product/material produced