[ protocol, preference ]

Protocol from which the route was learned and the preference value for the route.

+—A plus sign indicates the active route, which is the route installed from the routing table into the forwarding table.

- —A hyphen indicates the last active route.

*—An asterisk indicates that the route is both the active and the last active route. An asterisk before a to line indicates the best subpath to the route.

In every routing metric except for the BGP LocalPref attribute, a lesser value is preferred. In order to use common comparison routines, Junos OS stores the 1's complement of the LocalPref value in the Preference2 field. For example, if the LocalPref value for Route 1 is 100, the Preference2 value is -101. If the LocalPref value for Route 2 is 155, the Preference2 value is -156. Route 2 is preferred because it has a higher LocalPref value and a lower Preference2 value.
https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-route.html

C is correct