Select the description(s) that result in a ragged 2-d (matrix) array instantiation.
(this means that directly after the described instantiation, the matrix will be a ragged array with some row lengths being different from other row lengths in the matrix, not a matrix in which all the row lengths in are the same.)
a. a numpy 2-d array whose shape is described by a tuple, like (4, 8) or (3, 4), passed to the constructor.
b. a python list-of-lists in which not all of the inner lists are the same length.
c. a python list-of-lists in which all of the inner lists are the same length.
d. a numpy 1-d array whose individual elements point to separate numpy 1-d arrays (each of which might be a different length).

Melissa needs to add a topic to an email that she will send to her teacher. choose the name of the field where she should type her topic.

How would you cite different books by the same author on the works cited page? moore, jack h. folk songs and ballads. salem: poetry press, 1999. print. moore, jack h. ballads in poetry – a critical review. dallas: garden books, 1962. print. moore, jack h. folk songs and ballads. salem: poetry press, 1999. print. –––. ballads in poetry – a critical review. dallas: garden books, 1962. print. moore, jack h. ballads in poetry – a critical review. dallas: garden books, 1962. print. moore, jack h. folk songs and ballads. salem: poetry press, 1999. print. moore, jack h. ballads in poetry – a critical review. dallas: garden books, 1962. print. –––. folk songs and ballads. salem: poetry press, 1999. print.

Which computer network component connects two different networks together and allows them to communicate? a is a node (or a device) that connects two different networks together and allows them to communicate.