A. package.json is present in the root directory of any Node application/module.
B. package.json is used to define the properties of a package.
C. package.json can be used to update dependencies of a Node application.
D. All of the above.
package.json is present in the root directory of any Node application/module and is used to define the properties of a package. It can also be used to update dependencies of a Node application.