help with this biostats problem

Given the graph below showing the dependence of the covariate and the response variable in two treatments used for an ANCOVA, which is/are true (more than one can be true)? lose Participant's Libido 2- Partner's Libido O The observations are not independent You cannot use ANCOVA for this analysis You are violating the assumption of homogeneity of slope You can use ANCOVA for this analysis