Which of the common ancestors occurred most recently

“Phylogenetic“ refers to anything related to phylogenetics, which is the branch of biology that deals with the evolutionary development and diversification of a species or group of organisms. Phylogenetics aims to understand the evolutionary relationships among various species or genes, typically represented in a phylogenetic tree or diagram. A phylogenetic tree is a branching diagram or “tree“ showing the inferred evolutionary relationships among various biological species based upon similarities and differences in their physical or genetic characteristics. The fundamental goal of phylogenetic studies is to reconstruct the lineage of organisms or genes to determine how they are related to one another. This involves: Identifying the ancestral relationships and descent among species or genes. Classifying organisms based on their evolutionary history. Tracing the evolution of specific traits or genes across species over time. Phylogenetic analyses use various types of data, including morphological (physical characteristics) and molecular (DNA, RNA, or protein sequences), to infer evolutionary relationships. These analyses help scientists understand the biodiversity and the history of life on Earth, contributing to fields such as conservation biology, systematics, and evolutionary biology. Problem: The tree shown above is rooted. Which of the common ancestors occurred most recently? А) The ancestor of human and chimpanzee В) The ancestor of human, chimpanzee, mouse and rat С) The ancestor of mouse and rat