In analyzing a particular corpus, the following information is provided: Term t Kangaroos Total # documents $150$ # docs containing t $23$ TF for t in document d $5$ Which of the following is true? Notes: Use log to base $10$ to calculate IDF a$.)$ TF$-$IDF $=23*150$ b$.)$ TF$-$IDF $=9\mathrm{.}07$ c$.)$ TF$-$IDF $=10\mathrm{.}5$ d$.)$ TF$-$IDF $=1$