The systems development life cycle (SDLC) is: A. a method for testing new IT applications. B. a structured approach for developing information systems. C. the analysis and assessment tasks that need to be completed when designing and developing information systems. D. a set of guidelines that an end user follows when developing their own business applications.

The answer is "Option B"

Explanation:

This process requires the user to create an information network built on computers and also to manage them. All these are special design and manufacturing systems, that enable manual data to be automated, that's why many computer information technologies don't require manual data mining, and wrong choices can be described as follows:

In option A, It is not only used in testing. In option C,  It is an approach, that first analyzes then developed. In option D, It is not only used in business applications.

Ireally like network models.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.