What Is the Early Start Time for Activity D Given

question 76

Multiple Choice

What is the early start time for Activity D given the activity times and precedence requirements shown in the table? $$\begin{array} { | l | l | l | } \hline \text { Activity } & \text { Time } & \text { Predecessor } \\\hline \text { A } & 5 & - - \\\hline B & 6 & \text { A } \\\hline \mathrm { C } & 4 & \text { A } \\\hline \mathrm { D } & 5 & \mathrm {~B} , \mathrm { C } \\\hline\end{array}$$

• A)7
• B)9
• C)11
• D)13

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Definitions:

Optical Activity

The property of chiral molecules to rotate plane-polarized light, a phenomenon measured using polarimetry.

Enantiomer

Molecules that are mirror images of each other but cannot be overlaid onto each other, much like left and right hands.

Meso Compound

A type of stereochemical isomer with multiple stereocenters that is superimposable on its mirror image, making it achiral despite containing chiral centers.

Diastereomers

Isomers that have a different spatial orientation of atoms but are not mirror reflections of each other.