What's the brains reward pathway under normal conditions

This is the new face book like like like like like like

Which action is most likely to contribute to a positive self-image?

The virus genome and viral proteins are assembled into virions (virus particles) during ) the lytic cycle and the lysogenic cycle in all known host organismsb) the lysogenic cycle onlyc) the lytic cycle onlyd) the lytic cycle in all host organisms but the lysogenic cycle only in bacteria