During IPv4 address planning you must choose a primary CIDR mask for each subnet. Which CIDR mask range is valid for a Google Cloud VPC subnet primary IPv4 range?

The correct answer is /16 to /29. Google Cloud VPC subnets require a primary IPv4 range with a CIDR mask between /16 and /29, inclusive. This range balances the need for sufficient IP addresses within a subnet while preventing excessively large or small subnets that could lead to inefficient IP address utilization or management complexities. The option "/8 to /30" is incorrect because /8 to /15 are too large, and /30 is too small for a primary subnet range. "/31" and "/32" are also too small. "Only /24" is incorrect as it's too restrictive; other sizes are allowed. "Any mask between /8 and /32 is accepted" is incorrect because it includes masks that are either too large (like /8 to /15) or too small (like /30 to /32).