1. It involves the classification of different types of data and the extraction of useful information from massive and complex datasets, which one is it? a. big data classification b. logistic regression c. support vector machine d. clustering techniques 2. It describes the hidden digital facts that a monitoring system collects, which one is it? a. knowledge b. data c. controls d. operations 3. Which of the following are included in the phases of supervised learning algorithms? a. training b. testing c. validation d. clustering