**Core Concept**
The use of an angled target in the X-ray tube is a technique to produce X-rays with a specific spectral distribution. This is achieved by altering the angle of the target relative to the direction of the electron beam, which affects the energy of the X-rays produced.

**Why the Correct Answer is Right**
When the target is angled, the electrons striking the target have a component of their velocity perpendicular to the target surface. This results in the production of X-rays with a broader energy spectrum, including more low-energy X-rays. This is in contrast to a parallel target, where the electrons strike the target perpendicularly, producing X-rays with a narrower energy spectrum. The angled target is often used in dental X-ray machines to produce X-rays with a lower peak voltage, which is better suited for imaging dental structures.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because angling the target does not increase the peak voltage of the X-rays produced.
**Option B:** This option is incorrect because the use of an angled target does not affect the spatial resolution of the X-rays produced.
**Option C:** This option is incorrect because the angled target does not produce X-rays with a higher energy level than a parallel target.

**Clinical Pearl / High-Yield Fact**
The use of an angled target in the X-ray tube is an important consideration in dental radiography, as it allows for the production of X-rays with a lower peak voltage, which is better suited for imaging dental structures and reducing the risk of radiation exposure to the patient.

**Correct Answer: D. Angled target X-ray tubes produce X-rays with a broader energy spectrum, including more low-energy X-rays, which is beneficial in dental radiography.**