What values are in the vector named pressures after the following code is executed? vector pressures; pressures. push_back(32.4); pressures. push_back(33.5); pressures. insert(pressures. begin(), 34.2); int index = 2; pressures. insert(pressures. begin() + index, 31.8); pressures. push_back(33.3); index = 1; pressures. erase(pressures. begin() + index); a. 34.2, 31.8, 33.3 b. 34.2, 33.5, 31.8, 33.3 c. 34.2, 33.5, 33.3 d. 34.2, 31.8, 33.5, 33.3

Hence the correct option is A that is "34.2 31.8 33.5 33.3".

Explanation:  

Program:-  

#include <iostream>

#include<vector>  

using namespace std;  

int main()

{

int count =0;

vector<double> pressures;

pressures.push_back(32.4);

pressures.push_back(33.5);

pressures.insert(pressures.begin(), 34.2);

int index = 2;

pressures.insert(pressures.begin() + index, 31.8);

pressures.push_back(33.3);

index = 1;

pressures.erase(pressures.begin() + index);

for (auto it = pressures.begin(); it != pressures.end(); ++it)

cout << ' ' << *it;

return 0;

}