Correct answer is Specify throttling , security and other policies
MuleSoft Doc Ref : https://docs.mulesoft.com/api-manager/2.x/api-gateway-capabilities-mule4 API Gateway is responsible for below functions.
1) Determine which traffic is authorized
2) Meter the traffic
3) Logs transaction
4) Apply throttling and other policies (Not specifying. These are specified in API Manager)

Choice router finds the FIRST true condition, then distribute the event to the ONE matched route.
MuleSoft Doc Ref : https://docs.mulesoft.com/mule-runtime/4.1/choice-router-concept The Choice router dynamically routes messages through a flow according to a set of DataWeave expressions that evaluate message content. Each expression is associated with a different routing option. The effect is to add conditional processing to a flow, similar to an if/then/else code block in most programming languages.
Only one of the routes in the Choice router executes, meaning that the first expression that evaluates to true triggers that route's execution and the others are not checked. If none of the expressions are true, then the default route executes.

Gold is not valid category for connector types.
MuleSoft Doc Ref : https://docs.mulesoft.com/mule-runtime/3.7/anypoint-connectors#connector-support-categories