(Choose 1 answer) \nWhich of the two graphs below is more modular? **A**\nmermaid\ngraph LR\nsubgraph Cluster_A1\na1((•)) --- a2((•))\na1 --- a3((•))\na2 --- a3\na2 --- a4((•))\na3 --- a4\nend\nsubgraph Cluster_A2\nb1((•)) --- b2((•))\nb1 --- b3((•))\nb2 --- b3\nb2 --- b4((•))\nb3 --- b4\nend\na3 --- b1 **B**\nmermaid\ngraph LR\nsubgraph Cluster_B1\nc1((•)) --- c2((•))\nc1 --- c3((•))\nc1 --- c4((•))\nc2 --- c3\nc2 --- c4\nc3 --- c4\nend\nsubgraph Cluster_B2\nd1((•)) --- d2((•))\nd1 --- d3((•))\nd1 --- d4((•))\nd1 --- d5((•))\nd2 --- d3\nd2 --- d4\nd2 --- d5\nd3 --- d4\nd3 --- d5\nd4 --- d5\nend\nc2 --- d1