The Consolidate command can summarize data only within the same workbook

An analog POTS voice line is no longer working and Kim, the technician, is tasked to verify if a dial tone is present at the IDF. Which of the following tools would be used?

A. Protocol analyzer B. Butt set C. OTDR D. Toner probe

Which method will be executed when the following statements are executed?

``` ClassC item1 = new ClassA(); item1.method1(); ``` ``` Given the following code: Line 1 public class ClassA Line 2 { Line 3 public ClassA() {} Line 4 public void method1(int a){} Line 5 } Line 6 public class ClassB extends ClassA Line 7 { Line 8 public ClassB(){} Line 9 public void method1(){} Line 10 } Line 11 public class ClassC extends ClassB Line 12 { Line 13 public ClassC(){} Line 14 public void method1(){} Line 15 } ``` a. Line 4 b. Line 9 c. Line 14 d. This is an error and will cause the program to crash.